The console.count() method is an inbuilt application programming interface of the console module which is used to count label passed to it as a parameter, by maintaining an internal counter for that specific label.
Syntax:
console.count(label)
Parameters: This method has one parameter as mentioned above and described below:
- label: It is an optional parameter specifies the label to be counted. Default value is “default”.
Return Value: This method outputs the count of this function called with the specified label to the stdout.
Below examples illustrate the use of console.count() method in Node.js:
Example 1:
// Node.js program to demonstrate the // console.count() Method // Accessing console module const console = require('console');
// Calling console.count() console.count("a");
console.count("b");
console.count("a");
console.count("a");
console.count("a");
console.count("b");
console.count("b");
console.count("b");
|
Output:
a: 1 b: 1 a: 2 a: 3 a: 4 b: 2 b: 3 b: 4
Example 2:
// Node.js program to demonstrate the // console.count() Method // Accessing console module const console = require('console');
// Calling console.count() method // with no parameter to count // default label console.count(); console.count("a");
console.count("b");
console.count("a");
console.count("a");
console.count(); console.count(); console.count(); console.count("b");
|
Output:
default: 1 a: 1 b: 1 a: 2 a: 3 default: 2 default: 3 default: 4 b: 2
Note: The above program will compile and run by using the node filename.js command.
Reference: https://nodejs.org/api/console.html#console_console_count_label